It's my understanding that choosing "Stay On Rollout" in the trigger options for a widget and adding a "Close Button" would basically give you tooltip that fades in and stays open until the close button is clicked—fading it back out. If this thinking is correct than the functionality is broken in the Tooltip widget. Running Mac OsX 10.7.3

Close button does not work, they realize that but just haven't come out with a fix yet. There is a messy work around - you kindof have to hack your tooltip widget a bit. But here is the explanation below:

I found a wonky work-around. Instead of closing, I put a next button and made the second tooltip blank. With the type tool, I changed the ">" for next to a "x" and made it the same color as the background so it would disappear into the background after "closing".

I am having the same problem. Thanks Sean for posting the information on the work-around. My background on my website is a photo so I'm having trouble hiding the text for the button so I'll have to get creative to make it less noticeable.